Freud believed delayed needs at a psychosexual stage could lead to fixation, influencing personality and behaviors.
At fertilization, the chromosomes from the father's sperm unite with the chromosomes from the mother's egg, creating a new cell called a zygote.
Sigmund Freud believed that if our needs were delayed at a particular psychosexual stage, we could become fixated at that stage. This means that we would continue to be preoccupied with the pleasure area associated with that stage, and our personality and behaviors would be affected accordingly.
Freud's theory of psychosexual development has been criticized for being oversimplified and deterministic, and it is not widely accepted by modern psychologists. However, it has been influential in the development of personality theory and continues to be taught in many psychology courses.
It is important to note that these are just general guidelines, and there is a lot of individual variation in how people progress through the psychosexual stages.
The zygote is a diploid cell, meaning that it has two copies of each chromosome, one from the mother and one from the father. The zygote is the first cell of a new human life, and it contains all of the genetic material that is needed for the development of a new individual.
The zygote will undergo a series of rapid cell divisions, eventually forming a ball of cells called a blastocyst. The blastocyst will then implant in the uterine wall, where it will continue to develop into a fetus.